Thread: MT82 / LT230Q oil- are they the same?

Penrite list:
ProGear 75-85 for Box
ProGear 75-90 for Transfer

Being where you are you may well get away with the same in both

To maintain warranty I'd use BOT328 in the MT82, which IIRC is a 75W-90 fluid.

IME Motul Gear 300 is an excellent manual trans/transaxle 75W-90 fluid, and what I also use in the LT230, especially when using an ATB centre diff. It has a ridiculously high VI (viscosity index) which in use means it thins the least of any manual trans fluid I've seen and yet is extremely fluid at 0*C.
Ordinarily this would mean a heavy dose of VII's, Viscosity index Improvers. These are polymeric thickeners that when added to a lighter base oil help them resist thinning with increasing temps (making our oils multigrades. The poylolester base fluids Motul use also have a natural multigrade ability too)
Unfortunately VII's tend to shear rapidly in gearbag use.
Whatever magic trickery Motul employ, this doesn't seem to happen with Gear 300.
I also use it in the R380, which sends certain people into apoplexy.

People go on (and on, and on..) about not using a GL5 rated fluid in a manual gearbox, "it'll eat the synchro's !" they cry, which is absolute bollocks if the sulfur/phos additive package is buffered, and there are many other ways to blend a hypoid diff fluid without resorting to a heavy sulfur/phos add pack anyway.
Sure, a diff fluid isn't ideal for a manual gearbox fluid, generally it works against decent synchro function, but Motul Gear 300 works extremely well as a manual trans fluid (as does Castrol's old Syntrax 75W-90, now Syntrax Universal Plus)

Be prepared for sticker shock !

Vehicle is out of warranty now, so no allegiance one way or another brand wise, hence why I was curious as to 'why not' use the same in both GB and Tcase.

I've seen the night/day differences a good vs a poor transmission fluid can make (in my other car) so hoping to get this decision right.

I was put onto a supplier of Motul Gear 300 for approx 35 bucks per litre, which surprisingly was marginally cheaper than the 20L drum price.

Mitch, my .02c, I'd go that way.
Gear 300 is as good/better than most 75w/80/85's in frosty weather with less gear/bearing rattle at high ambient/high loads in my experience.

If you wanted you could use it in front and back diffs too,

Motul are recommending MOTYLGear 75-90 for Gearbox, Diffs and Transfer

Originally Posted by Tombie

Motul are recommending MOTYLGear 75-90 for Gearbox, Diffs and Transfer

Cheers Mike, which means Gear 300 will be fine.

Motylgear are their semi-synth (more cost effective) blends, the 300V range is the all out competition, full synthetic, predominantly ester based lubes.

Funnily enough the bloke I used for my oil analysis (based in the US) wasn't a huge Motul fan, reckoned it was good but overrated, but he did have a general dislike of the French.
I've found it excellent in use.

Im really liking the idea of having one drum of juice for the whole driveline.
Two ques
- who stocks 20L Motul 300
- Mitch where have you found it for $35/L

Im thinking though that a 20L drum will make the most sense

S

info....

*I use in customers Defender TDCi models, both new in warranty and out...in the LT230 transfer case, MT82 gearbox, both diffs.
*Penrite Pro Gear 75W90
*Your warranty will remain intact, in fact customers that have had warranty claims, its never been an issue even though i've serviced many of these vehicles since new.

*To somehow believe that a LR dealer uses the BOTxx packaged product is fantasy, each time in the past a customer requested I use the BOTxx, it was never in stock and had to be ordered in (what does that tell you?)

*The FORD branded fluid for the MT82 isnt even imported into Australia (ask any Ford dealer here)

Regards
Daz